Tiffany and Nora had a total of $110 at first. After Tiffany spent
25 of her money and Nora spent
12 of her money, they had the same amount of money left.
- How much money did Tiffany have at first?
- Nora has the same number of $5-notes and $10-notes at first. How many $10-notes did she have at first?
| |
Tiffany |
Nora |
Total |
Before |
5 u |
2x3 =
6 u |
11 u |
Change |
- 2 u |
- 1x3 =
- 3 u |
|
After |
3 u |
1x3 =
3 u |
|
(a)
The amount that Tiffany and Nora had in the end is the same. Make the amount that they each had in the end the same. LCM of 1 and 3 is 3.
Total amount that Tiffany and Nora had at first
= 5 u + 6 u
= 11 u
11 u = 110
1 u = 110 ÷ 11 = 10
Amount that Tiffany had at first
= 5 u
= 5 x 10
= $50
(b)
Amount that Nora had at first
= 6 u
= 6 x 10
= $60
Nora has the same number of $5-note and $10-note at first.
Value of 1 set of $5-note and $10-note
= 5 + 10
= $15
Number of 5-notes
= 60 ÷ 15
= 4
Answer(s): (a) $50; (b) 4
